package java_thinking.unit_21._21_10;

/**
 * @Desc:
 * @author: cww
 * @DateTime: 2019/6/20 18:55
 */

public class DollarAmount {

    public DollarAmount(int amount) {
    }

    public DollarAmount add(DollarAmount d) {
        return null;
    }

    public DollarAmount subtract(DollarAmount d) {
        return null;
    }

    public int compareTo(DollarAmount dollarAmount) {
        return 0;
    }
}
